Gym Codex

Build the perfect plan

Create routines tailored to any training style and muscle group. Choose exercises, sets, reps, weights and rest times. Your plans are saved locally, always ready to use.

Execute and track every set

Start a session and log weights, reps and RPE in real time. Built-in timer, set-by-set history, and instant visual feedback on your progress.

Watch your progress take shape

Stats on sessions, volume, average duration, frequency and max loads. Compare periods, spot weaknesses and celebrate PRs.

Explore, search and see how it's done

A constantly growing exercise library. Filter by muscle group and add your own custom exercises. Watch an explanatory video for each exercise — without ever leaving the app.


No sign-up required

Download and go. Zero accounts, zero emails, zero spam.

100% free

No subscriptions, no premium tier. Every feature is included.

Local data

Your data stays on your device. No cloud, no external servers.


Export to JSON

Your data is yours. Export everything to JSON whenever you want.


Multilingual

Available in 5 languages: Italian, English, German, French and Spanish.


Customizable themes

The app offers numerous themes and accent colours to suit every occasion.